JP2009068507A - Reduction gear - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To solve the problem that at least 4 models of reduction gears are necessary when reduction gears of the same size are used to produce reduction gears applied to a hollow or solid output shaft because conventional reduction gears having a hollow and solid output shaft are individually provided with supporting bearings or fitted gears as independent parts, and in particular, the reduction gears with the solid shaft have the output shafts protruding to the right side or the left side, or right and left sides output. <P>SOLUTION: The reduction gear comprises a hollow shaft, which includes a gear in periphery, and is rotatably supported within a gear casing, and a solid shaft adapter fitted in the hollow shaft with a whirl stop. Furthermore, the output shaft is constructed in such a way that in the solid shaft adapter, both ends, or either of the ends is projected to the outside of the hollow shaft, and fixed to the hollow shaft by a fixing mechanism. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to a reduction gear having a solid output shaft in a reduction gear having a structure in which an input shaft direction of an electric motor and an output shaft direction of the reduction gear are orthogonal to each other.

  As shown in Patent Document 1, there are a model with a hollow output shaft (see Patent Documents 1 and 2) and a model with a solid shape (see Patent Document 3). In the same size reduction gears shown in FIGS. 5 to 8 as conventional examples, the bearings to be supported and the gears to be fitted are composed of separate parts, respectively. Manufactured each reducer applicable to the model.

JP 2002-39284 A JP 2006-207828 A JP 2001-258207 A

In the conventional reducer with a hollow output shaft (hollow output shaft model) and a solid shape (solid output shaft model), the bearings to be supported and the gears to be fitted are configured as separate parts as described above. Yes. In particular, in a reduction gear of a solid output shaft model, there are various directions in which the output shaft protrudes, such as the right side, the left side, and the left and right sides. For this reason, when manufacturing the reduction gear applied to a hollow and a solid-shaped output shaft with the reduction gear of the same size, as shown in FIGS. 5-8, at least 4 types of reduction gears were required.
The present invention has been made to solve the above-mentioned problems. The first object is to share components around the output shaft, and the second object is to reduce the number of manufacturing models in manufacturing. Is.

  A speed reducer according to the present invention includes a hollow shaft having a gear on an outer peripheral surface and rotatably supported in a gear case, and a solid shaft adapter that is fitted and inserted into the hollow shaft with a detent. The real shaft adapter is configured such that both ends or any one of the ends protrudes to the outside of the hollow shaft and is fixed to the hollow shaft by a fixing mechanism.

  According to the speed reducer of the present invention, for example, the above-mentioned four models can be prepared by manufacturing one type of hollow output shaft model speed reducer and manufacturing a solid adapter as an additional part. In other words, with a hollow output shaft of the same specification and a solid output shaft of the same specification, it is possible to provide a reduction gear excellent in standardization that supports multi-specification that allows the output shaft to be taken out at both ends and one of them to be taken out. . In addition, in the present invention, it is necessary to newly provide a solid adapter fixing mechanism. However, in practical orthogonal reduction motors, the hollow output shaft model occupies most of the number used, so that Even if a new fixing mechanism (member) is used, it is possible to expect an effect more than that of a conventional orthogonal reduction motor, and it is possible to reduce the number of manufacturing models and to reduce the cost.

Hereinafter, embodiments of the present invention will be described with reference to the drawings.
In addition, the same code | symbol shows the same or an equivalent part between each figure.

Embodiment 1 FIG.
1 is a cross-sectional view showing a structure of a reduction gear output shaft portion of an orthogonal reduction gear according to Embodiment 1 of the present invention.
In FIG. 1, the output shaft of the speed reducer is based on a hollow output shaft (hereinafter referred to as “hollow shaft”) 5 similar to the orthogonal speed reducer having the conventional structure shown in FIG. Is used to constitute a one-projection type solid output shaft.
That is, the output shaft of the first embodiment is inserted into the hollow shaft 5 from the right side, the bearing 3 provided on the left and right sides of the gear cases 1 and 2, the hollow shaft 5 rotatably supported by the bearing 4. And a solid shaft adapter 6.
The solid shaft adapter 6 is fitted and inserted into the hollow shaft 5 so that the right end protrudes, and is prevented from rotating with respect to the hollow shaft 5 by a key 60. The solid shaft adapter 6 is attached to the hollow shaft 5 by the following fixing mechanism.
The fixing mechanism of the first embodiment includes an engagement flange 61 provided on the protruding end side of the solid shaft adapter 6 and locked at the opening of the hollow shaft 5, and an insertion end side of the solid shaft adapter 6. A spacer 63 that is locked by a C-type retaining ring 62 provided on the inner wall 5a of the hollow shaft, and a bolt 64 that is inserted into the hollow shaft through this spacer and screwed into the inner end surface 6a of the solid shaft adapter 6 The solid shaft adapter 6 is clamped between the engagement flange 61 and the spacer 63 by tightening the bolt 64 and is attached to the hollow shaft 5. A gear 7 that transmits the rotational force of the electric motor is provided on the outer diameter portion of the hollow shaft 5.
Although FIG. 1 shows the case where the solid shaft adapter 6 protrudes to the right, the solid shaft adapter 6 protrudes in either the left or right direction by changing the mounting position of the key 60 and the C-type retaining ring 62. Can be assembled.

Embodiment 2. FIG.
FIG. 2 is a cross-sectional view showing the structure of the reduction gear output shaft portion of the orthogonal reduction gear according to the second embodiment of the present invention.
In the first embodiment, the spacer 63 is disposed inside the hollow shaft 5, but in the second embodiment, the C-type retaining ring 62 is eliminated as shown in FIG. The actual shaft adapter 6 disposed outside is mounted on the hollow shaft 5 by the following fixing mechanism and constitutes a one-side protruding type solid output shaft.
That is, the fixing mechanism of the second embodiment is similar to the first embodiment in that the engagement collar 61 is provided at the protruding end of the solid shaft adapter and is locked at one opening of the hollow shaft 5, and the C type A spacer 63 which is eliminated from the retaining ring and is locked at the other opening of the hollow shaft 5, and a bolt 64 which is inserted into the hollow shaft through this spacer and screwed into the inner end surface 6a of the solid shaft adapter. The solid shaft adapter 6 is clamped between the engagement flange 61 and the spacer 63 by tightening the bolt 64 and is attached to the hollow shaft 5.
In this way, the C-type retaining ring 62 can be abolished, and new effects such as improved workability due to the tightening of the bolt 64 being an external work are generated.
Although FIG. 2 shows the case where the solid shaft adapter 6 protrudes to the right, the solid shaft adapter 6 can be assembled so as to protrude in either the left or right direction by changing the mounting position of the solid shaft adapter 6.

Embodiment 3 FIG.
FIG. 3 is a cross-sectional view showing a structure of a reduction gear output shaft portion of an orthogonal reduction gear according to a third embodiment of the present invention.
In the third embodiment, the fixing mechanism of the solid shaft adapter 6 is further simplified as compared with the first and second embodiments.
That is, the fixing mechanism of the third embodiment eliminates the other C-type retaining ring 62, the spacer 63, the bolt 64, and the like, leaving the engagement flange 61, and the solid shaft adapter 6 has an inner end portion. The side is fixed to the hollow shaft 5 by fitting and press-fitting into the hollow shaft 5 from the opening of the hollow shaft 5, thereby constituting a one-side protruding output shaft.
In this manner, the solid shaft adapter 6 can be press-fitted and fixed to the hollow shaft 5 to fix the structure without the need for spacers or bolts.
Although FIG. 3 shows the case where the solid shaft adapter 6 protrudes to the right, the solid shaft adapter 6 can be assembled so as to protrude in either the left or right direction by changing the mounting position of the solid shaft adapter 6.

Embodiment 4 FIG.
4 is a cross-sectional view showing the structure of a reduction gear output shaft portion of an orthogonal reduction gear according to a fourth embodiment of the present invention.
The fourth embodiment is applied to a model in which the output shaft projects to the left and right sides.
That is, the fixing mechanism of the fourth embodiment includes an engagement flange 61 provided at one projecting end of the solid shaft adapter 6 and locked at one opening of the hollow shaft 5, and the solid shaft adapter 5. The solid shaft adapter 6 is sandwiched between the engagement flange 61 and the spacer 63, and is formed of a C-type retaining ring 62 provided on the outer peripheral portion of the other protruding end and locked at the other opening of the hollow shaft 5. Then, mounting to the hollow shaft 5 is performed.
By configuring in this way, a double-projection output shaft similar to the conventional double-projection solid output shaft shown in FIG. 8 is constructed, and similar effects are obtained.

It is sectional drawing which showed the structure of the reduction gear output-shaft part of the orthogonal reduction gear which is Embodiment 1 of this invention. It is sectional drawing which showed the structure of the reduction gear output-shaft part of the orthogonal reduction gear which is Embodiment 2 of this invention. It is sectional drawing which showed the structure of the reduction gear output-shaft part of the orthogonal reduction gear which is Embodiment 3 of this invention. It is sectional drawing which showed the structure of the reduction gear output-shaft part of the orthogonal reduction gear which is Embodiment 4 of this invention. It is a structural diagram of a model that adopts a hollow output shaft of a conventional orthogonal reduction gear. It is a structural diagram of a model in which the output shaft protrudes to the right side with a solid output shaft of a conventional orthogonal reduction gear. It is a structural diagram of a model in which the output shaft protrudes to the left side with a solid output shaft of a conventional orthogonal reduction gear. It is a structural diagram of a model in which the output shaft protrudes to the left and right sides with a solid output shaft of a conventional orthogonal reduction gear.

Explanation of symbols

1 Case 2 Case 3 Bearing 4 Bearing 5 Hollow shaft 6 Solid shaft adapter 60 Key 61 Engagement flange 62 C retaining ring 63 Spacer 64 Bolt 7 Gear

Claims (5)

  A hollow shaft having a gear on the outer peripheral surface and rotatably supported in the gear case, and a solid shaft adapter inserted into the hollow shaft with a rotation stop, the solid shaft adapter having both ends, Alternatively, either one of the end portions protrudes outside the hollow shaft and is fixed to the hollow shaft by a fixing mechanism to constitute an output shaft.   A hollow shaft having a gear on the outer peripheral surface and rotatably supported in the gear case, and the hollow shaft is fitted and inserted into the hollow shaft so that one end of the hollow shaft projects outside the hollow shaft. A solid shaft adapter fixed to the solid shaft adapter, and the fixing mechanism is provided at the projecting end of the solid shaft adapter and locked at the opening of the hollow shaft; and the solid shaft adapter A spacer provided in the hollow shaft on the insertion end side, and a bolt inserted through the spacer into the hollow shaft and screwed into the inner end surface of the solid shaft adapter. Thus, the solid shaft adapter is fixed to the hollow shaft between the engagement flange and the spacer to constitute a one-side protruding output shaft.   A hollow shaft having a gear on the outer peripheral surface and rotatably supported in the gear case, and the hollow shaft is fitted and inserted into the hollow shaft so that one end of the hollow shaft projects outside the hollow shaft. A solid shaft adapter fixed to the hollow shaft, and the fixing mechanism is provided at the projecting end of the solid shaft adapter and locked at one opening of the hollow shaft; and the hollow shaft And a bolt inserted into the hollow shaft through the spacer and screwed into the inner end surface of the solid shaft adapter. A reduction gear characterized in that the solid shaft adapter is fixed to the hollow shaft between the joint portion and the spacer to constitute a one-projection output shaft.   A hollow shaft having a gear on the outer peripheral surface and rotatably supported in the gear case, and the hollow shaft is fitted and inserted into the hollow shaft so that one end of the hollow shaft projects outside the hollow shaft. A solid shaft adapter fixed to the solid shaft adapter, and the fixing mechanism has an engagement flange portion provided at a protruding end portion of the solid shaft adapter and locked by an opening of the hollow shaft, A reduction gear characterized in that a solid adapter is fixed to the hollow shaft by fitting and fitting the shaft adapter into the hollow shaft from the opening of the hollow shaft, thereby forming a one-side protruding output shaft. .   A hollow shaft having a gear on the outer peripheral surface and rotatably supported in the gear case, and both ends of the hollow shaft are fitted so as to protrude outside both ends of the hollow shaft, and are fixed to the hollow shaft by a fixing mechanism. A solid shaft adapter, and the fixing mechanism is provided at one projecting end portion of the solid shaft adapter and is engaged with one opening of the hollow shaft, and the solid shaft. C-type retaining ring provided at the other protruding end of the adapter and locked at the other opening of the hollow shaft, and the solid shaft adapter by the engagement collar and the C-type retaining ring A reduction gear characterized in that both are fixed to the hollow shaft to constitute a projecting output shaft.

Images